Latin America Optics and Photonics Conference

Spectroscopy of Atoms Confined to Micrometric Pores in Glass

H. Failache, Lucía Amy, S. Villalba, L. Lenci, Athanasios Laliotis, A. Lezama

Published Jan 1, 2016• 1 citation

Abstract

We present two-photon spectroscopy of rubidium vapor contained in the interstitial cavities of porous glass. We report on the first observation of Rydberg atoms under 3D spatial confinement in these micrometric size dielectric cavities.

DOI: 10.1364/laop.2016.ltu2b.5

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Spectroscopy of Atoms Confined to Micrometric Pores in Glass

H. Failache, Lucía Amy, S. Villalba, L. Lenci, Athanasios Laliotis, A. Lezama

Published Jan 1, 2016• 1 citation

Publisher

Abstract

DOI: 10.1364/laop.2016.ltu2b.5

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We study the two-photon laser excitation to the

5{D}_{5/2}

energy level of

^{85}\mathrm{Rb}

atoms contained in the interstices of a porous material made from sintered ground glass with typical pore dimensions in the 10--100 $\ensuremath{\mu}\mathrm{m}$ range. The excitation spectra show unusual flat-top line shapes, which are shown to be the consequence of wave-vector randomization of the laser light in the porous material. For large atomic densities, the spectra are affected by radiation trapping around the

{D}_{2}

transitions. The effect of the transient atomic response limited by the time of flight between pores walls appears to have a minor influence in the excitation spectra. It is however revealed by the shortening of the temporal evolution of the emitted blue light following a sudden switch-off of the laser excitation.